High gain, low noise pre-amplifier for increasing the sensitivity of microwave spectrum analysers & receivers. Item is normally powered by mains via a plug-in socket unit providing the DC. There is also a rechargeable 12v battery which will allow an all day operation isolated from the mains. The actual amp comes with a back-to-back “k”(m) adapter enabling direct connection to input of a receiver. Also included is a 1m length of UFA-147 40GHz cabler.